The most common and most likely answer to this crossword clue is the 6 letter word BUDGED
B
U
D
G
E
D
Buddy explains!

The straight part
We know that "changed" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case changed = budged.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does BUDGED mean?
BUDGED verb- To move.
- To move.
- To yield in one’s opinions or beliefs.
- (Minnesota, Wisconsin, Iowa) To cut or butt (in line); to join the front or middle rather than the back of a queue.
- To try to improve the spot of a decision on a sports field.